6f0ba0d04d789f17e3f0136a3591a9465af7e71d
[git/git.git] / builtin-prune.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "diff.h"
4 #include "revision.h"
5 #include "builtin.h"
6 #include "reachable.h"
7
8 static const char prune_usage[] = "git-prune [-n]";
9 static int show_only;
10
11 static int prune_object(char *path, const char *filename, const unsigned char *sha1)
12 {
13 char buf[20];
14 const char *type;
15
16 if (show_only) {
17 if (sha1_object_info(sha1, buf, NULL))
18 type = "unknown";
19 else
20 type = buf;
21 printf("%s %s\n", sha1_to_hex(sha1), type);
22 return 0;
23 }
24 unlink(mkpath("%s/%s", path, filename));
25 rmdir(path);
26 return 0;
27 }
28
29 static int prune_dir(int i, char *path)
30 {
31 DIR *dir = opendir(path);
32 struct dirent *de;
33
34 if (!dir)
35 return 0;
36
37 while ((de = readdir(dir)) != NULL) {
38 char name[100];
39 unsigned char sha1[20];
40 int len = strlen(de->d_name);
41
42 switch (len) {
43 case 2:
44 if (de->d_name[1] != '.')
45 break;
46 case 1:
47 if (de->d_name[0] != '.')
48 break;
49 continue;
50 case 38:
51 sprintf(name, "%02x", i);
52 memcpy(name+2, de->d_name, len+1);
53 if (get_sha1_hex(name, sha1) < 0)
54 break;
55
56 /*
57 * Do we know about this object?
58 * It must have been reachable
59 */
60 if (lookup_object(sha1))
61 continue;
62
63 prune_object(path, de->d_name, sha1);
64 continue;
65 }
66 fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
67 }
68 closedir(dir);
69 return 0;
70 }
71
72 static void prune_object_dir(const char *path)
73 {
74 int i;
75 for (i = 0; i < 256; i++) {
76 static char dir[4096];
77 sprintf(dir, "%s/%02x", path, i);
78 prune_dir(i, dir);
79 }
80 }
81
82 int cmd_prune(int argc, const char **argv, const char *prefix)
83 {
84 int i;
85 struct rev_info revs;
86
87 for (i = 1; i < argc; i++) {
88 const char *arg = argv[i];
89 if (!strcmp(arg, "-n")) {
90 show_only = 1;
91 continue;
92 }
93 usage(prune_usage);
94 }
95
96 save_commit_buffer = 0;
97 init_revisions(&revs, prefix);
98 mark_reachable_objects(&revs, 1);
99
100 prune_object_dir(get_object_directory());
101
102 sync();
103 prune_packed_objects(show_only);
104 return 0;
105 }